Question: Hi. I live on the top floor of a hundred year old brownstone in Brooklyn, NY. Each floor has a not- working fireplace & mantel. It turns out that the chimney was designed for gas heat and is too small for a wood burning fireplaces even if opened up and relined or whatever. So I am thinking about a stove. As a child I have fond memories of sleeping in a room with an old cast iron stove, watching the fire and hearing the crackling.I would want it for the cosmetic & spirtual effects of having a fire. The apartment alsmost always has enough heat. The chimney may or may be usable as a vent. Answer: A small woodstove would (of course) need a chimney. Something like the Jotul 602 or #3 would do the job (https://www.hearth.com/jotul). Problem with these and most other stoves is that they do put off heat. The #3 with the screen option (open fire) will put out less than when closed. Gas stoves also put out heat...and come in different varieties, vented (need to reline chimney) and unvented (no chimney needed)... If the chimney could be relined or opened up to a min. 8" size, perhaps a set of gas fireplace logs might be best. These look good, and the vented models do not produce much heat.